Once in loader mode, the SoC enumerates on USB as a (VID 0x04F2 – Sunplus, or similar). It does not appear as a disk drive — only the PC tool can talk to it.
The application running on Windows (rarely Mac/Linux) that sends the handshake and transfers new firmware (also called a "binary" or "ROM file") onto the device’s flash memory. sunplus loader
Sunplus Loader is a software tool used to flash or update the firmware on digital satellite receivers that use Sunplus chipsets (like the common 1506 series). While there is no widely documented receiver model officially named "Solid Story," this likely refers to a Once in loader mode, the SoC enumerates on
sudo modprobe usbhid quirks=0x04f2:0xb2a:0x4 sudo ./spflasher -r firmware_dump.bin # read flash sudo ./spflasher -w new_firmware.bin # write flash Sunplus Loader is a software tool used to